20 Most Recent 1991 Mazda B-Series - Page 7 Questions & Answers

what you need to do ,is when problem is there ,is put a meter on your starter wire ,its small wire going to starter and see are you getting voltage to it when you turn key if you are then you have a problem with your starter .if no voltage maybe a wiring problem or neutral switch somewhere on line or relay

As per the problem, it can be fuel related or problem with spark plugs and coils.It has to be tested to confirm the problem.-----------

A car that cranks/turns over but doesn't start, in many cases will be due to a bad fuel pump, a broken timing belt, an inoperative cam sensor or crank sensor. Also these problems are related to faulty spark plug. Check the spark at spark plugs when you start the car. Do you notice any spark. Actually you should see. If in case there is no spark then it's a spark plug problem. Also the coil pack gives power to spark plug. So check the voltage at coil pack. It will show 12 volt. If there is no voltage noticed at coil pack then its faulty coil pack that has to be replaced. If all the possible options checked out ok then check the car starter. The starter gets power from battery to start the car. If the starter is faulty then it will not let the car to start. Also check and confirm that there is fuel in the car. If its very low fuel then in some cases this causes the problem. Also check and confirm that fuel pump is functioning properly and the fuel filter is not clogged. One of the easiest ways to check for a fuel pump related problem is to spray a little starting fluid into the air intake while trying to start the car. If the car starts momentarily, then there's a good chance the fuel pump is not working or the car is out of gas. You can also listen for the fuel pump's humming sound when the key is first turned on. Also if a inoperative fuel pump is suspected, a good technician will always check to verify there is power and ground being supplied to the pump, to eliminate the possibility of a bad relay or electrical issue. Fuel pressure can be checked with a pressure gauge and if there is pressure, pulse can be checked at the fuel injectors in several ways including the most common, with the use of noid lights. If the injectors don't have pulse the engine won't start. ---------- This troubleshooting tips will help you to solve the problem. Thanks. Helpmech.

Check the throttle cable is pulling the throttle all the way open....if okay....

Possible blocked exhaust system...usually the catalytic converter. Remove the Oxygen Sensor and road test....if quicker, you found the problem.

...or go to a shop and ask fro a back pressure test. They will install a probe and gauge in the exhaust and run engine at 2000 to 2500 rpm and briefly to WOT.

Any reading over 2 psi indicates a partially blocked muffler system.

BLACK SMOKE FROM DIESEL ENGINE COULD BE RESTRICTED AIR INTAKE CHANGE AIR FILTER.INJECTION PUMP TIMING TOO ADVANCE OR.FUEL NOZZLES DIRTY OR WORN, NOT SPRAYING ATOMONIZING FUEL CORECTLY.

dear friend-it sounds like you are having a circulation problem,when the engine has reached normal working temp feel the two radiator hoses they should be the same heat,also check the water pump to see if the impeller is not loose,it is not to say that the radiator is clean after a flush,it must be opened to clean.

Probably the start of a head gasket breech. You can buy a block tester at your local parts store for thirty to forty dollars. Follow the insructions in the box, and it will detect exhaust gasses in your coolant. this is a pretty sure way to detect a combustion to cooling system breech. The cat converter may be masking the white smoke from the coolant once it reaches temp.